My mom was stung by a wasp this morning and she applied household bleach to the sting. She said that this is what her mom used way back when (my mom is in her 70's) for a variety of bites. She said that it substantially reduced the immediate burning sensation. Couple of hours later no swelling, she usually has noticeable localized swelling, and very little redness at the site of the sting. Bleach is now mommy tested and approved for insect bites.